User System Plan

1. Database Schema (`User` model)

Identity & Security
- username (unique, required)
- pgp (unique, required)
- is_verified (boolean)
Contacts
- xmpp (unique, required)
- email (unique, optional)
- phone (unique, optional)
Personal Info
- firstname (required)
- lastname (required)
- sex (male / female, required)
- date_of_birth (required)
- race (optional)
Profile & Media
- profile_picture (required)
- pictures (optional array)
Location
- country (required)
- city (optional)
Physical Attributes
- height (optional float)
- weight (optional int)
Preferences
- prefered_age_range (optional)
- likes (optional array)
- dislikes (optional array)

User fills form
- All fields except id, is_verified.
Server receives data
- Validate required fields and unique constraints.
- Temporarily store as unverified.
PGP Verification
- Server encrypts a message with user's PGP public key.
- Show validation page with encrypted message.
- User decrypts message and submits.
- Server validates ownership and sets is_verified=True.
Create Profile Page & Redirect
- Generate user profile page with all info.
- Redirect user to main page or search page.

Display: Public user profiles as cards
- Show profile_picture, firstname, lastname, age, country, city.
Filters:
- All fields except pgp, id, username.
- Include boolean checks for presence of email, phone, xmpp.
Profile Click
- Open full profile page with all info, pictures, likes/dislikes.

User enters username + PGP key.
Server verifies PGP via challenge.
On success:
- User can edit all fields execpt id and username.
- User can change pgp key, new pgp key must be verified.

Software used:
- Flask (backend framework)
- Postgres SQL (Database)
- SQLAlchemy (ORM)
- python-gnupg (PGP validation)
- Flask-WTF (Forms validation)